Expose live application audio groups

config/dot/quickshell/audio-streams-harness.qml

@@ -1,8 +1,10 @@
 import Quickshell
 import Quickshell.Io
+import Quickshell.Services.Pipewire
 import QtQuick
 
 import "services/AudioStreams.js" as AudioStreams
+import qs.services
 
 ShellRoot {
     readonly property int audioOutStreamFlag: 4
@@ -112,5 +114,23 @@ ShellRoot {
                 muted: chromium.nodes.map(node => node.audio.muted)
             });
         }
+
+        function serviceSummary(): string {
+            const applications = AudioDevices.applications;
+            return JSON.stringify({
+                count: applications.length,
+                validTypes: applications.every(application =>
+                    application.nodes.every(node =>
+                        (node.type & PwNodeType.AudioOutStream)
+                            === PwNodeType.AudioOutStream))
+            });
+        }
+
+        function invalidMutations(): string {
+            return JSON.stringify({
+                nullVolume: AudioDevices.setApplicationVolume(null, 0.5),
+                emptyMute: AudioDevices.setApplicationMuted({ nodes: [] }, true)
+            });
+        }
     }
 }